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Evaluation of microbial carbon pump in relation to dynamics of dissolved organic matter pool in the ocean

Research Project

Project/Area Number 24681002
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypePartial Multi-year Fund
Research Field Environmental dynamic analysis
Research InstitutionHokkaido University

Principal Investigator

YAMASHITA Youhei  北海道大学, 地球環境科学研究科(研究院), 准教授 (50432224)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥24,310,000 (Direct Cost: ¥18,700,000、Indirect Cost: ¥5,610,000)
Fiscal Year 2014: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Fiscal Year 2012: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Keywords海洋科学 / 生物地球化学 / 溶存有機物 / 微生物炭素ポンプ
Outline of Final Research Achievements

Dissolved organic matter (DOM) in the ocean constitutes one of the largest reduced carbon pools in the global carbon cycle. Bio-refractory components of DOM (RDOM) are major fraction of DOM, however, the sources/production mechanisms of RDOM have not been clarified. Recently, importance of microbial RDOM production has been pointed out, and this process has been defined as the microbial carbon pump (MCP). However, the mechanism of MCP has not been well documented.
In this study, we focused humic-like substances in DOM as a MCP product. We determined spatial distribution of humic-like substances in the open ocean and found that humic-like substances are possibly accumulated in the deep ocean. In addition, we established the microbial incubation technique for evaluating microbial RDOM production. The technique would be useful for quantitative evaluation of MCP.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (19 results)

All 2015 2014 2013 2012 Other

All Journal Article (10 results) (of which Peer Reviewed: 9 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (7 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Dynamics of dissolved organic matter in fjord ecosystems: Contributions of terrestrial dissolved organic matter in the deep layer2015

    • Author(s)
      Yamashita, Y., L.S. McCallister, B.P. Koch, M. Gonsior, and R. Jaffe
    • Journal Title

      Estuarine, Coastal and Shelf Science

      Volume: 159 Pages: 37-49

    • DOI

      10.1016/j.ecss.2015.03.024

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spatial variation in the origin and reactivity of dissolved organic matter in Oregon-Washington coastal waters2015

    • Author(s)
      LU, Y., J.W. EDMONDS, Y. YAMASHITA, B. ZOU, A. JAEGGE, and M. BAXLEY
    • Journal Title

      Ocean Dynamics

      Volume: 65 Issue: 1 Pages: 17-32

    • DOI

      10.1007/s10236-014-0793-7

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea2014

    • Author(s)
      TANAKA, K., K. KUMA, K. HAMASAKI, and Y. YAMASHITA
    • Journal Title

      Scientific Reports

      Volume: 4 Issue: 1 Pages: 5292-5292

    • DOI

      10.1038/srep05292

    • NAID

      120005465520

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Dissolved organic matter dynamics in the oligo/meso-haline zone of wetland-influenced coastal rivers2014

    • Author(s)
      MAIE, N., S. SEKIGUCHI, A. WATANABE, K. TSUTSUKI, Y. YAMASHITA, L. MELLING, K. CAWLEY, E. SHIMA, and R. JAFFE
    • Journal Title

      Journal of Sea Research

      Volume: 91 Pages: 58-65

    • DOI

      10.1016/j.seares.2014.02.016

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fluorescence characteristics of size-fractionated dissolved organic matter: Implications for a molecular assembly based structure?2014

    • Author(s)
      Romera-Castillo, C., M. Chen, Y. Yamashita, and R. Jaffe
    • Journal Title

      Water Research

      Volume: 55 Pages: 40-51

    • DOI

      10.1016/j.watres.2014.02.017

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluating the distribution of terrestrial dissolved organic matter in a complex coastal ecosystem using fluorescence spectroscopy2014

    • Author(s)
      Yamashita, Y., J.N. Boyer, and R. Jaffe
    • Journal Title

      Continental Shelf Research

      Volume: 66 Pages: 136-144

    • DOI

      10.1016/j.csr.2013.06.010

    • NAID

      120005343766

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photobleaching as a factor controlling spectral characteristics of chromophoric dissolved organic matter in open ocean2013

    • Author(s)
      YAMASHITA, Y., Y. NOSAKA, K. SUZUKI, H. OGAWA, K. TAKAHASHI and H. SAITO
    • Journal Title

      Biogeosciences

      Volume: 10 Issue: 11 Pages: 7207-7217

    • DOI

      10.5194/bg-10-7207-2013

    • NAID

      120005365915

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 海洋学の10年展望(II)-日本海洋学会将来構想委員会化学サブグループの議論から-2013

    • Author(s)
      神田穣太, 石井雅男, 小川浩史, 小埜恒夫, 小畑元, 川合美千代, 鈴村昌弘, 本多牧生, 山下洋平, 渡邉豊
    • Journal Title

      海の研究

      Volume: 22 Pages: 219-251

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 太平月刊海洋における溶存腐植様蛍光物質の分布-北太平洋中層水による陸起源腐植物質輸送の可能性-2012

    • Author(s)
      山下洋平
    • Journal Title

      月刊海洋

      Volume: 44 Pages: 486-491

    • Related Report
      2012 Annual Research Report
  • [Journal Article] Application of excitation emission matrix fluorescence monitoring in the assessment of spatial and seasonal drivers of dissolved organic matter composition : Sources and physical disturbance controls2012

    • Author(s)
      Maie, N., Y. Yamashita, R. M. Cory, J. N. Boyer,R. Jaffe
    • Journal Title

      Applied Geochemistry

      Volume: 27 Pages: 917-929

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] 海洋細菌単離株による溶存有機物の生成に関する研究2015

    • Author(s)
      後藤周史, 多田雄哉, 鈴木光次, 山下洋平
    • Organizer
      日本海洋学会 2015年度春季大会
    • Place of Presentation
      東京都
    • Year and Date
      2015-03-21 – 2015-03-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] 日本海内部における腐植様蛍光物質の蓄積2014

    • Author(s)
      田中和樹, 久万健志, 浜崎恒二, 山下洋平
    • Organizer
      日本地球惑星科学連合 2014年度連合大会
    • Place of Presentation
      横浜市
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] DISTRIBUTIONS OF DISSOLVED LIGNIN IN THE WESTERN NORTH PACIFIC: IMPLICATION FOR TRANSPORTATION OF TERRIGENOUS DISSOLVED ORGANIC MATTER ACCOMPANIED WITH IRON2014

    • Author(s)
      Ogawa, H., C. Lu, J. Nishioka, Y. Yamashita, R. Benner
    • Organizer
      2014 Ocean Science Meeting
    • Place of Presentation
      ハワイコンベンションセンター(ホノルル)
    • Related Report
      2013 Annual Research Report
  • [Presentation] Quantitative and qualitative characteristics of chromophoric dissolved organic matter (CDOM) in thewestern North Pacific2013

    • Author(s)
      Yamashita, Y., Y. Nosaka, K. Suzuki, H. Ogawa, K. Takahashi, and H. Saito
    • Organizer
      ASLO 2013 Aquatic Science Meeting
    • Place of Presentation
      Ernest N. Morial Convention Center(USA)
    • Year and Date
      2013-02-18
    • Related Report
      2012 Annual Research Report
  • [Presentation] Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea Proper Water2013

    • Author(s)
      Tanaka, K., K. Kuma, K. Hamasaki, T. Nagata, Y. Yamashita
    • Organizer
      The 6th China-Japan-Korea IMBER symposium
    • Place of Presentation
      東京大学(東京都)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 日本海における蛍光性溶存有機物の分布2013

    • Author(s)
      田中和樹, 久万健志, 浜崎恒二, 永田俊, 山下洋平
    • Organizer
      2013年度日本海洋学会秋季大会
    • Place of Presentation
      北海道大学(札幌市)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 西部北太平洋における溶存有機物の光学的性質2013

    • Author(s)
      山下洋平, 野坂裕一, 鈴木光次, 小川浩史, 高橋一生, 齊藤宏明
    • Organizer
      日本地球惑星科学連合 2013年度連合大会
    • Place of Presentation
      幕張メッセ(千葉市)
    • Related Report
      2013 Annual Research Report
  • [Book] Advances in the Physicochemical Characterization of Dissolved Organic Matter: Impact on Natural and Engineered Systems2014

    • Author(s)
      Jaffe, R., K.M. Cawley, and Y. Yamashita
    • Total Pages
      47
    • Publisher
      American Chemical Society
    • Related Report
      2014 Annual Research Report
  • [Remarks]

    • URL

      http://geos.ees.hokudai.ac.jp/yamashita/homu.html

    • Related Report
      2014 Annual Research Report

URL: 

Published: 2012-04-24   Modified: 2019-07-29  

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